Work-holding bail for typewriters



Oct. 30, 1928.

o. A. HOKANSON .WORK HOLDING BAIL FOR TYPEWRITERS Filed June 11,1923

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Patented Oct. 30, 1928.

UNITED STATES PATENT OFFICE.

OTTO A. HOKANSON, OF \VOODSTOACK, ILLINOIS, ASSIGNOE TO WOODSTOCK TYPEWRITER COMPANY, OF- WOODSTOCK, ILLINOIS, A CORPORATION. OF ILLINOIS.

WORK-HOLDING BAIL FOB T PEwRITEns; v

Application filed June 11, 1923-. Serial- N0. 644,549. r

This invention relates. to typewriter construction and more particularly a device cooperating with the platen for retaining the work in place during writing operation.

' parts in section, tion.

The invent-ion has for its object the provision of work holding mechanism, which shall be of improvedconstruction and convenient and efficient in operation. p

The invention is exemplified in the combination and arrangement of parts shown in: the accompanying drawing and described in the following specification and it is more. particularly pointed out in. the appended claims.

In the drawing, Fig. 1 is an elevation of a platen support such as is used on the Woodstock typewr ter having one embodiment of the present invention applied thereto.

Fig. 2 is a vertical section on line 22 of Fig. 1.

Fig. 3 is a vertical section on line 8-3 of Fig. I. t

Fig. 4k is a fragmentary plan view wlth showing a detail of construc- Fig. 5 is a section on line 55 of 1. Fig. 6, is a section on line 6-6 of Fig.1. Fig. 7' 'sa fragmentary elevation show ng amodified formof' paper finger mounting.

Fig. 8- is a sectional elevation of the form shown in Fig. 7 l

The platen support.- shown inFig. 1 is con nected by links. not shown to the platen car ri-age frame so that it may be given a limited vertical. movement forcase shift. The roller 10 travels along the shift rail for imparting this movementto the platen in a manner well known in the art. The platen ll isjournaled in end platesl2 and is provided with the usual linespace mechanism operated by 'a lever 13. A bar 1% extends longitudinally of the platen support between the plates 12, the ends ofthe bar being fitted in notches 15, as shown in Fig. 4, and detachably held in place bv screws 16, one at each end. A scale 17 may mounted on the front face of the bar- 14 if desired. Securedto each end of the bar 14 is a bracket 18 having an arm 19. pivoted at thereon. The arm 19 is provided with a rear wardly extending finger to. which a spring 22 is attached. The ends of the springs 22 are secured to lugs 23? carried by the brackets 18:. A red 24 connects the upper ends of the arms 19 so that the arms and rod together constitute a bail which may be swung about the pivots 20 toward and away from the platen roller. The springs 22 normally press the bar toward the platen. A

spring tongue 25 is secured to one of the brackets 18 and is provided with a rounded projection 26, which extends into the path of movement of the 19. WVhen the arm is swung into broken line position shown in Fig. 3the projection 26 springs past the arm and providesa stop for retaining it in its for ward position.' I

The platen roller is provided with the usual paper guide 27, so that when the rod 24 is in its forward position and workis fed from the rear about the roller it will be directed upwardly between the rod and the platen. After the paper indicated" at 28'l1a s been directed under the ba-ilby the guide 27 a slight pressure may be exerted on'the bar 24 sufficient to move it past the stop '26, whereupon it will be swung by the springs 22 toward the platen. The bar 24! preferably carries a series of rollers 29, which areniounted to rotate freely upon the bail but which are I fri'ctiona lly held against longitudinalmovement thereon. Each roller is provided with a sleeve 30 slidably mounted on the bar 24 and a leaf spring 31 is interp'osed'between the sleeve 81) and the bar 24' to frictionally retain the sleeve in various longitudinalposition-s'of'adiustment. The bar 24 has aportion 32 thereof flattene'dto provide a bean ing for the spring 31, the spring being bent intermediate its, ends so that the ends press outwardly against the sleeve while the central portion or the spring resiliently bears upon the flat face 32. Lugs 33 are formed on the ends of the spring to retain it in place within the sleeve. 'Theroller 29 is journaled onthe sleeve 30' and is held against longitudinal movement relativeto the sleeve by the lugs 33. In addition to the roll'ers29l thebar 32 preferably carries two" or more dowm wardly projecting spring fingers 85 to assist in holding the paper againsttheplaten. The fingers ifihhave ears 36 bent outwardlythere from through which the bar 24 passes. The ears 36 are provided with notches for receiving leaf springs 37, the outer ends of which arebent outwardly to press against the ears while the central portion bears upon the fiat face 32. Lugs 38 at the ends of the springs 37 retain the springs in position rela- 7 platen, but permits it to yield outwardly to accommodate the work interposed between the finger and platen. The lower ends of the fingers 35 are bent outwardly as shown at 39 to guide the work between the platen and the inner faces of the fingers. It will be seen from Fig. 1 that the ends of the fingers 35 slightly overlap the paper guide 27 so that the work will be directed from the upper edge of the paper guide beneath the outwardly bent portions 39 of the fingers.

VVheIi the bail. is swung forwardly into the broken line position in Fig. 3, the lower ends of the fingers will remain close to the paper guide 27 due to the relative position of the pivot 27 and to the fact that thejsprings 37 tend to swing the ends of the fingers inwardly. This will maintain the fingers 35 in proper position to engage the top face of the work and direct it to a position beneath the rollers 29. I

Theusual line finder is indicated at 40, the ends of the line finder being curved outwardly at 41 so that the fingers 35 will pass beneath the line finder if they are brought nearthe writing position by the movement of the carriage. outwardly to accommodate the fingers as indicated in Fig. 2. The rollers '29 are positionedabove the upper extremityof the line finder 35 but'closely adjacent thereto so that the work will be held as nearly to the printing 1 line as possible and yet permit the rollers to pass the line finder during movement of the carriage. It will be seen that the rollers 29 and fingers 35 can be adjusted along the rod 24 to accommodate different sizes of work. It will also be noted that the entire workholding mechanism is self-contained and mounted upon the bar 14, which may be removed from the platen frame by releasing the screws 16 and sliding the bar 14 upwardly from the notches 15. i This manner 0 mounting permits ready change of equipment so that standard machines may be easily supplied with the presentinvention, which can be furnished already assembled on the bar 14 so that it is only necessary to remove the usual bar and replace it with one bearing the paper holding mechanism arranged according to the present invention.

The line finderwill spring In the construction shown in Figs. 7 and 8,

7 3a yer fin 'ers 41 are ivotall mounted on e P y face thereof flattened, a spring finger having ears journaled on said bar, and a leaf spring interposed between said ears and the flat portion of said bar and arranged to bear on said bar to resiliently hold said fingers against rotation and frictionally retain said fingers in longitudinal adjustment along said bar.

2. The combination with a typewriter platen, of frame plates adjacent the ends of said platen, a supporting bar connecting said frame plates and detachably secured thereto, brackets mounted on said supporting bar, a

work holding bail having arms pivotally mounted. on said brackets, and resilient means carried by said bar for controlling-the position of said bail.

3. The combination with a typewriter platen, of frame plates arranged adjacent the endsof said platen in which said platen is journaled, said frame plates having recesses formed therein, a bar having the ends thereof fitted in said recesses, means for retaining said bar in position in said recesses, a work holder bail pivotallymounted on said bar, and means carried by said bar for controlling the position of said bail relative to said platen.

4. The combination with a typewriter platen, of a frame for said platen having end members in which said platen is journaled, a supporting bar detachably secured to said end members in front of said platen and below the writing line, brackets mounted on said supporting bar adjacent the ends of said platen, upwardly extending arms pivotally mounted on said brackets, 21 work holder bar connecting the upper ends of said arms and positioned above the writing line, work engaging members carried by said bar and ad justable longitudinally thereof, a spring carried by said supporting bar for swinging said arms toward said platen, and a resilient detent carried by said bar for retaining said arms in their forward positionwith said work holding bar spaced outwardly from said platen.

- 5. The combination with a typewriter platen, of a work holder bail pivotally mounted below the writing line and'having a bar extending longitudinally of said platen above the writing line, a paper guide having its upper edge positioned below the writing line, lower ends of said fingers inwardly toward resilient fingers extending downwardly from said paper guide when said bail is moved to said bar to a position adjacent the upper edge its forward position. I 10 of said paper guide, means for retaining said In testimony whereof I have signed my 5 paper bail in a forward position with said name to this specification on this 8th day of bar spaced outwardly from the face of said June, A. D. 1923. platen, and resilient means for swinging the OTTO A. HOKANSON; 

